Target Center's Green Rooftop

Here is a rendering of the green Target Center Roof. I am not sure if this is the final version? I found this one on google.

Landscapers worked to install an 80-pound strip of vegetation June 27th 2009 on the roof of the Target Center in Minneapolis. The green roof will be the third installed by the city and at 3.5 acres, the fifth largest in the United States. The price? $5.3 million. It will keep an estimated 3.68 million gallons of rainwater annually from draining into the Mississippi River.

This is the third green roof installed by Minneapolis city government, joining the City Hall and the downtown Central Library.

{startribune.com}